Improved model shows gamma rays and gold at merging neutron stars

14 hours 2 minutes ago
An international team of astrophysicists under Dutch leadership has demonstrated with an improved model that colliding neutron stars can emit gamma rays. Old models did not predict this and faltered since the merging of two neutron stars in 2017 that released gamma rays. The researchers publish their findings in the The Astrophysical Journal.

NASA's Perseverance rover bringing 3-D-printed metal parts to Mars

17 hours 2 minutes ago
If you want to see science fiction at work, visit a modern machine shop, where 3-D printers create materials in just about any shape you can imagine. NASA is exploring the technique—known as additive manufacturing when used by specialized engineers—to build rocket engines as well as potential outposts on the Moon and Mars. Nearer in the future is a different milestone: NASA's Perseverance rover, which lands on the Red Planet on Feb. 18, 2021, carries 11 metal parts made with 3-D printing.

Soyuz MS-17 delivers science experiments to ISS

17 hours 19 minutes ago
The Soyuz MS-17 spacecraft arrived to the International Space Station just three hours after launch on 14 October, with Roscosmos astronauts Sergei Ryzhikov and Sergei Kud-Sverchkov and NASA astronaut Kate Rubins on board.

NGC 1624-2 has a complex magnetospheric structure, observations reveal

17 hours 59 minutes ago
Using the Hubble Space Telescope (HST) and Canada-France-Hawaii Telescope (CFHT), astronomers have investigated a magnetized O-type star known as NGC 1624-2. Results of the study, presented in a paper published October 15 on the arXiv pre-print server, indicate that the star has a complex magnetospheric structure, what could have implications for our understanding of origin and evolution of magnetic fields in massive stars.

Technology ready for back-up detector X-IFU in Athena space telescope

1 day 13 hours ago
In 2031, ESA launches its new X-ray space telescope Athena. SRON Netherlands Institute for Space Research plays a large role in building one of its two instruments, the X-IFU spectrometer, by producing the camera plus the back-up detectors. SRON scientists have now successfully developed detectors that are optimized for a readout based on a special system called Frequency Domain Multiplexing. They set a new world-record energy resolution at 6 keV of 1.3 eV.

Ultraviolet shines light on origins of the solar system

1 day 16 hours ago
In the search to discover the origins of our solar system, an international team of researchers, including planetary scientist and cosmochemist James Lyons of Arizona State University, has compared the composition of the Sun to the composition of the most ancient materials that formed in our solar system: refractory inclusions in unmetamorphosed meteorites.

New CubeSat will observe the remnants of massive supernovas

1 day 17 hours ago
Scientists at CU Boulder are developing a satellite about the size of a toaster oven to explore one of the cosmos' most fundamental mysteries: How did radiation from stars punch its way out of the first galaxies to fundamentally alter the make-up of the universe as it we know it today.

Humans experience 200 times more radiation standing on the moon than standing on the Earth

1 day 17 hours ago
January 31, 2021, will mark 50 years since the launch of Apollo 14. This historic mission was the first to broadcast a color television signal from the surface of the moon and marked the heroic return to space of America's first astronaut, Alan Shepard, who famously hit two golf balls off of the lunar regolith. While the significance of Apollo 14 and the Apollo program in general can't be overstated, Shepard spent a mere two days on the lunar surface. The record for the longest human presence on the moon, held by Eugene Cernan and Harrison Schmitt, is just over three days. All of the Apollo astronauts were exposed to high levels of radiation on the surface of the moon, but with such relatively short stays that the risk was considered to be acceptable.

Q&A: What touching an asteroid can teach us

1 day 17 hours ago
The University of Arizona-led OSIRIS-REx mission will make NASA's first attempt at collecting a sample from an asteroid on Oct. 20. The sample, which will be returned to Earth in 2023, has the potential to shed light on the origins of life and the solar system.

Evidence of broadside collision with dwarf galaxy discovered in Milky Way

1 day 17 hours ago
Nearly 3 billion years ago, a dwarf galaxy plunged into the center of the Milky Way and was ripped apart by the gravitational forces of the collision. Astrophysicists announced today that the merger produced a series of telltale shell-like formations of stars in the vicinity of the Virgo constellation, the first such "shell structures" to be found in the Milky Way. The finding offers further evidence of the ancient event, and new possible explanations for other phenomena in the galaxy.

Djorgovski 2 hosts multiple stellar populations, study suggests

1 day 17 hours ago
Astronomers have performed spectroscopic observations of a globular cluster (GC) known as Djorgovski 2 and obtained chemical abundances of the cluster's seven stars. The results suggest that Djorgovski 2 contains multiple stellar populations. The finding was detailed in a paper published October 8 on the arXiv pre-print repository.
24 minutes 26 seconds ago
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